Appears on releases
| # | Title | Length | Track artist | Release title | Country/Date | ||||
|---|---|---|---|---|---|---|---|---|---|
| Official | |||||||||
| 2.6 | 憧憬〜DOUKEI〜 | 3:39 | BACK-ON feat. IA | IA SUPER BEST -THE ARTIST- |
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| 1.18 | 憧憬〜DOUKEI〜 | 3:39 | BACK-ON feat. IA ROCKS | IA SUPER BEST -THE ARTIST- (24bit/48kHz) |
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| 1.18 | 憧憬～DOUKEI～ | 3:39 | IA | IA SUPER BEST -THE ARTIST- |
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